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author | Jonathan Lemon <jonathan.lemon@gmail.com> | 2022-03-10 12:19:09 -0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2022-03-11 11:54:45 +0000 |
commit | 1aa66a3a135a25bd8ce25165b4e550159a3dc849 (patch) | |
tree | a6ac51a43ce076459a0b1620ea01265b7551198c /drivers/ptp/ptp_ocp.c | |
parent | b325af3cfab970efa59b69cbcd9890be54713cef (diff) | |
download | linux-1aa66a3a135a25bd8ce25165b4e550159a3dc849.tar.gz linux-1aa66a3a135a25bd8ce25165b4e550159a3dc849.tar.bz2 linux-1aa66a3a135a25bd8ce25165b4e550159a3dc849.zip |
ptp: ocp: Program the signal generators via PTP_CLK_REQ_PEROUT
The signal generators can be programmed either via the sysfs
file or through a PTP_CLK_REQ_PEROUT ioctl request.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp/ptp_ocp.c')
-rw-r--r-- | drivers/ptp/ptp_ocp.c | 103 |
1 files changed, 94 insertions, 9 deletions
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c index fed59b61d86a..32874a721aaa 100644 --- a/drivers/ptp/ptp_ocp.c +++ b/drivers/ptp/ptp_ocp.c @@ -332,6 +332,8 @@ static int ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r); static irqreturn_t ptp_ocp_ts_irq(int irq, void *priv); static irqreturn_t ptp_ocp_signal_irq(int irq, void *priv); static int ptp_ocp_ts_enable(void *priv, u32 req, bool enable); +static int ptp_ocp_signal_from_perout(struct ptp_ocp *bp, int gen, + struct ptp_perout_request *req); static int ptp_ocp_signal_enable(void *priv, u32 req, bool enable); static int ptp_ocp_sma_store(struct ptp_ocp *bp, const char *buf, int sma_nr); @@ -867,13 +869,27 @@ ptp_ocp_enable(struct ptp_clock_info *ptp_info, struct ptp_clock_request *rq, ext = bp->pps; break; case PTP_CLK_REQ_PEROUT: - if (on && - (rq->perout.period.sec != 1 || rq->perout.period.nsec != 0)) - return -EINVAL; - /* This is a request for 1PPS on an output SMA. - * Allow, but assume manual configuration. - */ - return 0; + switch (rq->perout.index) { + case 0: + /* This is a request for 1PPS on an output SMA. + * Allow, but assume manual configuration. + */ + if (on && (rq->perout.period.sec != 1 || + rq->perout.period.nsec != 0)) + return -EINVAL; + return 0; + case 1: + case 2: + case 3: + case 4: + req = rq->perout.index - 1; + ext = bp->signal_out[req]; + err = ptp_ocp_signal_from_perout(bp, req, &rq->perout); + if (err) + return err; + break; + } + break; default: return -EOPNOTSUPP; } @@ -885,6 +901,24 @@ ptp_ocp_enable(struct ptp_clock_info *ptp_info, struct ptp_clock_request *rq, return err; } +static int +ptp_ocp_verify(struct ptp_clock_info *ptp_info, unsigned pin, + enum ptp_pin_function func, unsigned chan) +{ + struct ptp_ocp *bp = container_of(ptp_info, struct ptp_ocp, ptp_info); + char buf[16]; + + if (func != PTP_PF_PEROUT) + return -EOPNOTSUPP; + + if (chan) + sprintf(buf, "OUT: GEN%d", chan); + else + sprintf(buf, "OUT: PHC"); + + return ptp_ocp_sma_store(bp, buf, pin + 1); +} + static const struct ptp_clock_info ptp_ocp_clock_info = { .owner = THIS_MODULE, .name = KBUILD_MODNAME, @@ -895,9 +929,10 @@ static const struct ptp_clock_info ptp_ocp_clock_info = { .adjfine = ptp_ocp_null_adjfine, .adjphase = ptp_ocp_null_adjphase, .enable = ptp_ocp_enable, + .verify = ptp_ocp_verify, .pps = true, .n_ext_ts = 4, - .n_per_out = 1, + .n_per_out = 5, }; static void @@ -1466,6 +1501,30 @@ ptp_ocp_signal_set(struct ptp_ocp *bp, int gen, struct ptp_ocp_signal *s) } static int +ptp_ocp_signal_from_perout(struct ptp_ocp *bp, int gen, + struct ptp_perout_request *req) +{ + struct ptp_ocp_signal s = { }; + + s.polarity = bp->signal[gen].polarity; + s.period = ktime_set(req->period.sec, req->period.nsec); + if (!s.period) + return 0; + + if (req->flags & PTP_PEROUT_DUTY_CYCLE) { + s.pulse = ktime_set(req->on.sec, req->on.nsec); + s.duty = ktime_divns(s.pulse * 100, s.period); + } + + if (req->flags & PTP_PEROUT_PHASE) + s.phase = ktime_set(req->phase.sec, req->phase.nsec); + else + s.start = ktime_set(req->start.sec, req->start.nsec); + + return ptp_ocp_signal_set(bp, gen, &s); +} + +static int ptp_ocp_signal_enable(void *priv, u32 req, bool enable) { struct ptp_ocp_ext_src *ext = priv; @@ -1740,11 +1799,32 @@ ptp_ocp_sma_init(struct ptp_ocp *bp) } } +static int +ptp_ocp_fb_set_pins(struct ptp_ocp *bp) +{ + struct ptp_pin_desc *config; + int i; + + config = kzalloc(sizeof(*config) * 4, GFP_KERNEL); + if (!config) + return -ENOMEM; + + for (i = 0; i < 4; i++) { + sprintf(config[i].name, "sma%d", i + 1); + config[i].index = i; + } + + bp->ptp_info.n_pins = 4; + bp->ptp_info.pin_config = config; + + return 0; +} + /* FB specific board initializers; last "resource" registered. */ static int ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r) { - int ver; + int ver, err; bp->flash_start = 1024 * 4096; bp->eeprom_map = fb_eeprom_map; @@ -1761,6 +1841,10 @@ ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r) ptp_ocp_sma_init(bp); ptp_ocp_signal_init(bp); + err = ptp_ocp_fb_set_pins(bp); + if (err) + return err; + return ptp_ocp_init_clock(bp); } @@ -3238,6 +3322,7 @@ ptp_ocp_detach(struct ptp_ocp *bp) pci_free_irq_vectors(bp->pdev); if (bp->ptp) ptp_clock_unregister(bp->ptp); + kfree(bp->ptp_info.pin_config); device_unregister(&bp->dev); } |